The mineral of the shell is almost pure calcium carbonate, with some magnesium, formed of radiating crystals . 蛋壳的矿物质几乎为纯碳酸钙,还有一些镁,形成放射状结晶。
Pyroxene is exclusively diopsidic augite, with a composition relatively close to the diopside-hedenbergite join . 所有辉石是透辉石质普通辉石,其成分相对近于透辉石--镁铁辉石。
Examinations of several thousand thin sections revealed a few examples of unaltered ferromagnesian and sulfide minerals . 经过对数千薄片的研究发现了少数未变化的铁镁和硫化物矿的实例。
The chief differences between chlorophyll and heme are the presence of a magnesium atom in the center of the porphyrin ring . 叶绿素和血红素之间的主要的差别为在卟啉环中心存在一个镁原子。
Sodium, sulfate, magnesium, calcium, carbonate, bicarbonate, chloride, and boron should be determined in a water analysis . 水质分析要测定钠、硫、镁、钙、碳酸盐、重碳酸盐、氯和硼的含量。
There is no immediate advantage to be derived from supplementation except perhaps to ensure an adequate intake of magnesium . 也许除了保证引入适量的镁以外,补充精饲料不会立即得到什么好处。
With regard to the oxide minerals, chromite is almost entirely contained in the olivine-rich ultramafic rocks in the lower part of the intrusion . 关于氧化矿物,铬铁矿几乎全部含于侵入体下部的富橄榄石的超镁铁质岩石中。
This film is deposited on the surface of the glass by evaporating crystals, use of cryolite or magnesium fluoride, in a vacuum . 涂敷薄膜时,通常是将玻璃置于真空之中,然后使冰晶石或氟化镁晶体气化,令其沉积于玻璃表面上。
Magnesium and magnesium alloys - wrought magnesium alloys 镁和镁合金.锻造镁合金
Simulation of thermal process of pedgeon ' s magnesium reduction 制镁还原罐的研制